[Docs] README.md - separators, thumbnail, styling, toc

[ghost]

[Docs] README.md - Separators, Thumbnail, Styling, ToC

_{this PR does basically aim at:}

• _{adding serparators to README.me file}
• _{adding thumbnail to README.me file}
• _{adding styling to README.me file}
• _{adding toc to README.me file}

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_{main motivation behind such:}

• _{improving overall document accessability}

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_{let's make the web better bit by bit ever tried, ever failed no matter. try again, fail again, fail better}

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[ghost]

_{just added collapsable sections. feel free to checkout and give me some form of feedback}